Tournaisian (Early Carboniferous/Mississippian) ammonoids from the Ma'der Basin (Anti-Atlas, Morocco)

Abstract

Three succeeding assemblages of Early Tournaisian (Mississippian) ammonoids are described from Fezzou (Ma'der) in the Anti-Atlas of Morocco; they are, in ascending order, composed of the following genera: (1) <i>Gattendorfia-Eocanites</i> Assemblage: <i>Acutimitoceras, Costimitoceras, Imitoceras, Kornia, Gattendorfia, Kazakhstania</i>, and <i>Eocanites</i>; (2) <i>Gattendorfia-Kahlacanites</i> Assemblage: <i>Acutimitoceras, Hasselbachia, Gattendorfia, Becanites</i>, and <i>Kahlacanites</i>; and (3) <i>Goniocyclus-Protocanites</i> Assemblage: <i>Globimitoceras, Imitoceras, Gattendorfia, Goniocyclus, Eocanites</i>, and <i>Protocanites</i>. The following taxa are newly described: <i>Globimitoceras rharrhizense</i> n. sp., <i>Acutimitoceras sarahae</i> n. sp., <i>A. endoserpens</i> n. sp., <i>A. pentaconstrictum</i> n. sp., <i>Costimitoceras aitouamar</i> n. sp., <i>Hasselbachia arca</i> n. sp., <i>Kornia citrus</i> n. gen. n. sp., <i>Gattendorfia lhceni</i> n. sp., and <i>G. gisae</i> n. sp. <br><br> Drei aufeinander folgende Vergesellschaftungen von Ammonoideen aus dem Tournaisium (Mississippium) werden von Fezzou (Ma'der) im Anti-Atlas von Marokko beschrieben; diese werden, in aufsteigender Reihenfolge, durch die folgenden Gattungen zusammen gesetzt: (1) <i>Gattendorfia-Eocanites</i> Assemblage: <i>Acutimitoceras, Costimitoceras, Imitoceras, Kornia, Gattendorfia, Kazakhstania</i> und <i>Eocanites</i>; (2) <i>Gattendorfia-Kahlacanites</i> Assemblage: <i>Acutimitoceras, Hasselbachia, Gattendorfia, Becanites</i> und <i>Kahlacanites</i>; und (3) <i>Goniocyclus-Protocanites</i> Assemblage: <i>Globimitoceras, Imitoceras, Gattendorfia, Goniocyclus, Eocanites</i> und <i>Protocanites</i>. Die folgenden Taxa werden neu beschrieben: <i>Globimitoceras rharrhizense</i> n. sp., <i>Acutimitoceras sarahae</i> n. sp., <i>A. endoserpens</i> n. sp., <i>A. pentaconstrictum</i> n. sp., <i>Costimitoceras aitouamar</i> n. sp., <i>Hasselbachia arca</i> n. sp., <i>Kornia citrus</i> n. gen. n. sp., <i>Gattendorfia lhceni</i> n. sp. und <i>G. gisae</i> n. sp. <br><br> doi:<a href="http://dx.doi.org/10.1002/mmng.200700003" target="_blank">10.1002/mmng.200700003</a>